用avalon实现一个完整的todomvc（带router）

　　照着todomvc官网的例子，做了一个avalon版的todos，功能全都有了，而且加了router模块，比司徒大大写的都完善(≧▽≦)/~

　　js文件整整100行，初次使用avalon，书写过程中绕了一些弯子，不过还好最终绕回来了。整体感觉如下：

相比用jQuery，代码量下去了，编码消耗的时间貌似更多了，一来是viewmodel需要一定的逻辑设计，不是像用jQuery那样一根筋一码到底，二来是可能我对框架还不是很熟，以后熟悉后效率会飞速提升。
有一些特性并不是想当然的那样，比如对数组监控，目前只能监控length的变化，数组元素如果是对象，属性发生变化无法监控。不过可以通过其他方式变通实现。
view层能看到什么，vm层几乎都需要有一个属性与之对应，宁可多写一个属性，也不要绕别的逻辑来展示数据了。vm扁平化应该是设计思路。

　　demo展示如下：

　　你也可以点这里访问单独页面。

　　源码也贴一下好了：

　　html：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf8" />
    <title>avalon todos</title>
    <link rel="stylesheet" href="css/base.css">
    <script src="js/avalon.min.js"></script>
</head>
<body>
<section id="todoapp" ms-controller="todos">
    <header id="header">
        <h1>todos</h1>
        <input id="new-todo" placeholder="What needs to be done?" autofocus ms-duplex="newtodo" ms-keyup="add">
    </header>
    <section id="main" style="display: block;">
        <input id="toggle-all" type="checkbox" ms-duplex-checked="allchecked">
        <label for="toggle-all">Mark all as complete</label>
        <ul id="todo-list">
            <li ms-class="completed:el.complete" ms-class-1="editing: $index === editindex" ms-repeat="todolist" ms-visible="filter===1 || filter===el.complete">
                <div class="view">
                    <input class="toggle" type="checkbox" ms-duplex-checked="el.complete" ms-change="setcompletednum">
                    <label ms-dblclick="edit($index, this)">{{el.content}}</label>
                    <button class="destroy" ms-click="$remove"></button>
                </div>
                <input class="edit" ms-duplex="el.content" ms-blur="editover">
            </li>
        </ul>
    </section>
    <footer id="footer" style="display: block;">
        <span id="todo-count"><strong>{{todolist.length}}</strong> item left</span>
        <ul id="filters">
            <li>
                <a ms-class="selected:filter===1" href="#!/all" ms-click="setFilter(1)">All</a>
            </li>
            <li>
                <a ms-class="selected:filter===false" href="#!/active" ms-click="setFilter(false)">Active</a>
            </li>
            <li>
                <a ms-class="selected:filter===true" href="#!/completed" ms-click="setFilter(true)">Completed</a>
            </li>
        </ul>
        <button id="clear-completed" ms-click="clear">Clear completed ({{completednum}})</button>
    </footer>
</section>
<div id="info">
    <p>双击列表可编辑</p>
    <p>前进、后退可观察路由效果</p>
    <p>Created by <a href="http://www.cnblogs.com/lvdabao">吕大豹</a></p>
</div>


<script src="js/index.js"></script>
</body>
</html>

　　index.js：

require(["mmRouter"], function(){
    var model = avalon.define({
        $id: "todos",
        newtodo: "",
        filter: 1, //1：all， false：active, true：completed
        allchecked: false,
        editindex: -1, //当前正在编辑的索引
        todolist: [
            {
                content: 'test111',
                complete: false
            },
            {
                content: 'test222',
                complete: true
            }
        ],
        completednum: 0,
        setcompletednum: function(){
            setTimeout(function(){
                var count = 0;
                avalon.each(model.todolist, function(i, el){
                    if(el.complete){
                        count++;
                    }
                });
                model.completednum = count;    
            }, 0);
        },
        add: function(e) {
            if(e.keyCode === 13){
                var newtodo = model.newtodo.trim();
                if (!newtodo.length) {
                    return;
                }
                model.todolist.push({
                    content: newtodo,
                    complete: false
                });
                model.newtodo = "";
            }
        },
        edit: function($index, node){
            model.editindex = $index;
            node.parentNode.parentNode.getElementsByTagName('input')[1].focus();
        },
        editover: function(){
            model.editindex = -1;
        },
        clear : function(){
            var actived = [];
            avalon.each(model.todolist, function(i, el){
                if(!el.complete){
                    actived.push(el);
                }
            });
            model.todolist = actived;
            model.completednum = 0;
        },
        setFilter: function(value){
            model.filter = value;
        }

    });
    model.setcompletednum();
    model.$watch('allchecked', function(a, b){
        avalon.each(model.todolist, function(i, el){
            el.complete = a;
        });
        if(a){
            model.completednum = model.todolist.length;
        }
        else{
            model.completednum = 0;
        }
    });
    model.todolist.$watch('length', function(){
        model.setcompletednum();
    });
    function callback() {
        var filter = 1;
        switch(this.path){
            case '/active' :
                filter = false;
            break;
            case '/completed' :
                filter = true;
            break
            case '/all' :
                filter = 1;
            break;
        }
        model.setFilter(filter);
    }
    avalon.router.get("/all", callback)
    avalon.router.get("/active", callback)
    avalon.router.get("/completed", callback)
    avalon.history.start();
    avalon.scan();
});